Lowest Common Ancestor of a Binary Tree at Meta

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Problem Description

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the [definition of LCA on Wikipedia](<https://en.wikipedia.org/wiki/Lowest_common_ancestor>): “The lowest common ancestor is defined between two nodes `p` and `q` as the lowest node in `T` that h...

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Tree Depth-First Search Binary Tree

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